5 GB
Reloads every 30 days
$10/mo
$2.00/GB · no contract
Try multi-network coverage without committing.
Change or cancel anytime.
Data-only SIMs on AT&T, T-Mobile & VerizonLive
One SIM. All three networks. No more dead zones.
FlexiFone data SIMs switch to whichever US network has the strongest signal where you are — unsteered, with no carrier playing favorites. From $4.92/mo, with unrestricted hotspot and nothing to sign.
- No contract, no credit check
- Unrestricted hotspot
- eSIM live in ~60 seconds
Your FlexiFone SIM
Picking the strongest network
- T-MobileConnected · 5G
- AT&TAvailable
- VerizonWeak signal
- 3
- US networks on one SIM
- $0.58
- Best price per gigabyte
- 75+
- Roaming destinations
- ~60s
- To activate an eSIM
AT&T · T-Mobile · Verizon
On the 50 GB annual plan
Up to 25 GB abroad per cycle
Scan the QR code and go
Plans
Straightforward data pricing
Pick an allowance, pick monthly or annual. Every plan has the same features — only the size and the billing period change.
30-day rolling. Change your plan or cancel whenever you like.
10 GB
Reloads every 30 days
$15/mo
$1.50/GB · no contract
Everyday backup data for one device.
Change or cancel anytime.
20 GB
Reloads every 30 days
$25$20/mo
$1.00/GB · no contract
The sweet spot for hotspots and daily driving.
Change or cancel anytime.
50 GB
Reloads every 30 days
$35/mo
$0.70/GB · no contract
Heavy tethering, routers, and remote work.
Promotional pricing, limited to two SIMs per customer.
2 GB/mo
Reloads every 30 days · 24 GB total
$59/year
Works out to $4.92/mo · $2.46/GB
Keep a device online for a year, cheaply.
Ideal for IoT, trackers, and backup lines.
5 GB/mo
Reloads every 30 days · 60 GB total
$79/year
Works out to $6.58/mo · $1.32/GB
Light monthly use, locked in for 12 months.
10 GB/mo
Reloads every 30 days · 120 GB total
$99/year
Works out to $8.25/mo · $0.83/GB
Our best price per gigabyte for everyday use.
20 GB/mo
Reloads every 30 days · 240 GB total
$199/year
Works out to $16.58/mo · $0.83/GB
Hotspot-friendly data with no monthly admin.
30 GB/mo
Reloads every 30 days · 360 GB total
$299/year
Works out to $24.92/mo · $0.83/GB
For always-connected routers and RVs.
50 GB/mo
Reloads every 30 days · 600 GB total
$399$349/year
Works out to $29.08/mo · $0.58/GB
Maximum allowance, maximum saving.
Promotional pricing, limited to two SIMs per customer.
Every plan includes
The same service on every plan. Only the allowance and the billing period change.
Unsteered multi-network switching
Your SIM moves between AT&T, T-Mobile and Verizon based on the strongest signal, not on a preferred-carrier list.
Allow or block specific networks
Pin your SIM to one network, or block the one your primary line already uses, from your account.
Unrestricted hotspot & tethering
Your full allowance is usable for tethering. No hotspot cap, no separate hotspot bucket.
5G where available
5G and LTE on all three networks, with no artificial speed cap and no de-prioritization by us.
eSIM or physical SIM
Activate an eSIM in about a minute, or have a physical SIM mailed to you for $5.
Works in any device
Phones, tablets, hotspots, routers, cameras, RVs and IoT — it is a plain data SIM with no app required.
No contract, no credit check
30-day rolling plans can be changed or canceled anytime. No activation fee, no early-termination fee.
Data reloads every 30 days
Annual plans reload your full allowance every 30 days for 12 months, so nothing is front-loaded.
Ordering more than a couple of SIMs?
Mix allowances, set quantities, and choose eSIM or physical per line in one order.
How it works
Four steps, then you can forget about it
No app to babysit and no settings to relearn. It behaves like a normal data SIM — it just has three networks behind it.
- 01
Set up your SIM or eSIM
Pick a plan and install it as a second data line on your phone, or drop the card into a tablet, hotspot or router.
- 02
Turn on data switching
Allow your device to use FlexiFone for mobile data when your primary line has nothing. One toggle in Settings.
- 03
Let it find the signal
In patchy areas your SIM moves between AT&T, T-Mobile and Verizon. You can also lock or block a network yourself.
- 04
Travel without thinking
Coverage follows you across the country, and roaming is included in 75+ destinations when you leave it.
Why FlexiFone
Built for the places your carrier isn't
Everything here is standard on every plan, from the $10 monthly SIM to the 50 GB annual.
Coverage where one carrier gives up
Dead spots are usually carrier-specific, not location-specific. With three networks on one SIM, the odds that all of them have nothing are very small.
Allow or block networks
Lock to one network, or block the carrier your primary line already uses so FlexiFone only covers the gaps.
No throttling from us
Your whole allowance runs at full speed. We don't de-prioritize traffic or meter hotspot use separately.
Any device, no app
Phones, tablets, hotspots, routers, cameras, RVs and IoT modules. It's a plain data SIM — nothing to install.
Priced per gigabyte, honestly
Annual plans get down to well under a dollar a gigabyte. No activation fee, no line fee, no surprise add-ons.
Roaming in 75+ destinations
Take up to 25 GB of your allowance abroad each cycle. The full destination list lives in your account.
Who it's for
A data SIM, pointed at the problem you actually have
Most people buy FlexiFone for one of three reasons. All three run on the same SIM and the same plans.
A second line for your phone
Keep your number and your carrier. Add FlexiFone as a data-only eSIM so your phone falls back to another network the moment your primary line drops.
Popular choice: 5 GB monthly · $10/mo
Start at 5 GBHotspots, routers and RVs
Unrestricted tethering with the whole allowance usable for a router. Physical SIMs work in every hotspot and cellular gateway we've tried.
Popular choice: 30 GB/mo annual · $24.92/mo
See annual plansBusiness fleets and IoT
Order many SIMs in one go, mix allowances across the fleet, and pick eSIM or physical per SKU. Annual plans keep the paperwork down to once a year.
Popular choice: 2 GB/mo annual · $4.92/mo
Bulk orderingThe difference
One network, or all of them
A single-carrier SIM is only as good as that carrier's nearest tower. This is the whole argument for a multi-network SIM.
| Feature | FlexiFone | Typical single-carrier plan |
|---|---|---|
| Networks available on one SIM | AT&T, T-Mobile and Verizon | One network only |
| Behavior in a dead spot | Switches to another network | No service until you move |
| Network selection control | Allow or block any network | Not offered |
| Hotspot allowance | Your full plan allowance | Capped, or a separate bucket |
| Contract and credit check | Neither, on rolling plans | Often both |
| Data-only pricing | From $10/mo, or $59/year | Usually bundled with voice |
| Works in routers and IoT | Yes, physical SIM or eSIM | Sometimes, on separate plans |
“Typical single-carrier plan” describes how prepaid data plans are commonly structured; individual carrier terms vary.
FAQs
Questions people ask before buying
The short answers. Longer setup guides and device notes live in the help center.
Which networks does FlexiFone use?
Your FlexiFone SIM has access to all three major US networks — AT&T, T-Mobile and Verizon. It is unsteered, which means your device picks whichever network is giving it the strongest signal in that location, rather than being locked to a single carrier's list of preferred partners.
How does switching between networks work?
Your device switches automatically when it loses signal completely. You can also switch manually at any time from Settings under Mobile Data, then Network Selection. Automatic switching is device dependent — it works best on iPhones, followed by recent Pixel and Samsung devices. If you have full bars but a slow or dead connection, you will need to select another network manually, because automatic switching only kicks in on a total loss of signal.
Can I use a FlexiFone SIM as my only line?
These are data-only SIMs, so they carry no phone number, no voice calls and no SMS. They are designed as a data line — either as a second SIM that covers the gaps in your primary carrier's coverage, or as the only SIM in a tablet, hotspot, router or IoT device. Calling and messaging over Wi-Fi apps such as FaceTime, WhatsApp or Zoom work normally over the data connection.
eSIM or physical SIM — which should I choose?
Choose eSIM if your device supports it. It is free, arrives by email within minutes of ordering, and takes about a minute to install by scanning a QR code. Choose a physical SIM ($5, 2 to 4 business days by USPS) if your device has no eSIM support, or if it is a hotspot, router or IoT device that only takes a card.
Can I tether or use my phone as a hotspot?
Yes, and there is no separate hotspot allowance — your whole plan is usable for tethering. If you plan to tether large volumes, our larger data-only plans and annual pricing are much cheaper per gigabyte than topping up.
Is there a contract, credit check or activation fee?
No contract and no credit check. There is no activation fee and no early termination fee. The only optional charge at checkout is $5 for a physical SIM to be mailed to you — eSIM delivery is free and instant.
From $4.92/mo
Try it on the network your carrier can't reach
Start on a 5 GB rolling plan for $10. If it doesn't fix your dead spots, cancel before the next 30 days and you're done.
- eSIM delivered by email in minutes
- Physical SIM $5, 2–4 business days
- Cancel rolling plans anytime